SOLUTION: I have 7 - 3y = 9x and I have to find the slope I got 21/7 is that right? Thanks!

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Question 114911: I have 7 - 3y = 9x and I have to find the slope
I got 21/7 is that right?
Thanks!

Found 3 solutions by checkley71, stanbon, MathLover1:
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
I'M AFRAID IT ISN'T RIGHT.
7-3Y=9X ADD 7 TO BOTH SIDES.
-3Y=9X-7 DIVIDE BOTH SIDES BY -3
Y=9X/-3-7/3 REDUCE THE X TERM
Y=-3X-7/3 ANSWER WHICH GIVES A SLOPE (m) OF -3 IN THE LINE EQUATION Y=mX+b

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
7 - 3y = 9x and I have to find the slope
-----------------
Solve for y:
3y = -9x+7
y = -3x+(7/3)
-----------------
slope = -3
y-intercept = 7/3
--------------------------------
Graph:
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-3x%2B%287%2F4%29%29
======================
Cheers,
Stan H.

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
7+-+3y+=+9x……write this equation in slope_intercept form y+=+mx+%2B+b where m is a slope and b is y_intercept

7+-+3y+=+9x……move -3y to the right and 9x to the left

7+-+3y+=+9x……divide both sides by 3
7%2F3+-+%289%2F3%29x+=+y……or
7%2F3+-+3x+=+y
y+=+-3x+%2B+7%2F3…....slope_intercept form


So, slope m is -3
and y_intercept is 2.33

Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc
Equation -9+x+%2B+-3+y+=+-7 describes a sloping line. For any
equation ax+by+c = 0, slope is -a%2Fb+=+--9%2F-3.
  • X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x = c/a. -7/-9 = 0.777777777777778.
  • Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is -7/-3 = 2.33333333333333.
  • Slope is --9/-3 = -3.
  • Equation in slope-intercept form: y=-3*x+2.33333333333333.